Just clone your old partition on the new hard drive . Software like Ghost can perform this task but are not free . You can download for free Disk utilities on hard drives manufacturers websites ( Seagate , Maxtor , Western-Digital , IBM-HITACHI ; i don't know for others manufacturers ) and sometimes they are already contained in a floppy disk bundled with your hard drive .
I have already proceded like this with my new Seagate drive .

These disk utilities fit on a floppy disk and are bootable . After booting your system they give you choices/abilities to perform tasks on your hard drives .